ES2563211T5 - Procedure for the preparation of aminocrotonyl compounds - Google Patents

Procedure for the preparation of aminocrotonyl compounds Download PDF

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ES2563211T5
ES2563211T5 ES12155662T ES12155662T ES2563211T5 ES 2563211 T5 ES2563211 T5 ES 2563211T5 ES 12155662 T ES12155662 T ES 12155662T ES 12155662 T ES12155662 T ES 12155662T ES 2563211 T5 ES2563211 T5 ES 2563211T5
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amino
chloro
fluorophenyl
tetrahydrofuran
yloxy
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ES2563211T3 (en
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Werner Rall
Christian Kulinna
Juergen Schnaubelt
Peter Sieger
Rainer Soyka
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Boehringer Ingelheim International GmbH
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D405/00Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
    • C07D405/02Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
    • C07D405/12Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a chain containing hetero atoms as chain links
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/04Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/16Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00Drugs for disorders of the respiratory system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P13/00Drugs for disorders of the urinary system
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00Antineoplastic agents

Description

DESCRIPCIÓNDESCRIPTION

Procedimiento para la preparación de compuestos de aminocrotoniloProcedure for the preparation of aminocrotonyl compounds

La invención se refiere a un procedimiento mejorado para la preparación de dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazo¡ina, así como a dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1 -oxo-2-buten-1 -il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina y a su uso para la preparación de medicamentos.The invention relates to an improved process for the preparation of 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-butene dimaleate -1-yl]amino}-7-((S)-tetrahydrofuran-3-yloxy)-quinazoin, and 4-[(3-chloro-4-fluorophenyl)amino]-6-{[ dimaleate 4-(N,N-dimethylamino)-1 -oxo-2-buten-1 -yl]amino}-7-((S)-tetrahydrofuran-3-yloxy)-quinazoline and its use for the preparation of medicines.

4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina posee la siguiente estructura:4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino}-7-((S) -tetrahydrofuran-3-yloxy)-quinazoline has the following structure:

Figure imgf000002_0001
Figure imgf000002_0001

y es ya conocida por el documento WO 02/50043 en el que se describen compuestos con valiosas propiedades farmacológicas a las que pertenece, en particular, un efecto inhibidor sobre la transducción de señales inducida por tirosina-quinasas y un efecto inhibidor sobre la transducción de señales inducida por el receptor del factor de crecimiento epidermal (EGF-R). Por lo tanto, compuestos de este tipo son adecuados para el tratamiento de enfermedades, en particular para el tratamiento de enfermedades tumorales, de enfermedades de los pulmones y de las vías respiratorias y de enfermedades del tracto gastrointestinal y de los conductos biliares y de la vesícula biliar. En el documento WO 02/50043 se da a conocer un procedimiento de preparación, en el que se preparan compuestos de aminocrotonilo (IV) tal como, por ejemplo, 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazo¡ina en una reacción en un solo recipiente a partir del correspondiente eslabón de anilina (II), ácido bromocrotónico (III), cloruro de oxalilo y una amina secundaria (véase el Esquema 1).and it is already known from document WO 02/50043 which describes compounds with valuable pharmacological properties to which it belongs, in particular, an inhibitory effect on the signal transduction induced by tyrosine kinases and an inhibitory effect on the transduction of signals induced by the epidermal growth factor receptor (EGF-R). Compounds of this type are therefore suitable for the treatment of diseases, in particular for the treatment of tumor diseases, of diseases of the lungs and of the respiratory tract and of diseases of the gastrointestinal tract and of the bile and gallbladder ducts. bile. WO 02/50043 discloses a preparation process, in which aminocrotonyl(IV) compounds such as, for example, 4-[(3-chloro-4-fluorophenyl)amino]-6- {[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino}-7-((S)-tetrahydrofuran-3-yloxy)-quinazolin in a single reaction vessel from the corresponding aniline linkage (II), bromocrotonic acid (III), oxalyl chloride and a secondary amine (see Scheme 1).

Esquema 1:Scheme 1:

Figure imgf000002_0002
Figure imgf000002_0002

En el caso de este procedimiento, el rendimiento ascendió a como máximo 50%. Además, la purificación se realizó, por norma general, mediante cromatografía en columna. Por lo tanto, el procedimiento no era adecuado para la preparación a escala técnica de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina. Además, el método tenía el inconveniente de que el ácido bromocrotónico no era comercialmente adquirible en grandes cantidades, y también el correspondiente éster metílico de ácido bromocrotónico sólo podía estar disponible en una pureza de aproximadamente el 80%. Estas circunstancias se oponen asimismo a la idoneidad de este procedimiento para la preparación técnica de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1 -il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina.In the case of this process, the yield was at most 50%. In addition, the purification was carried out, as a rule, by means of column chromatography. Therefore, the procedure was not suitable for the technical scale preparation of 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino}-7 -((S)-tetrahydrofuran-3-yloxy)-quinazoline. In addition, the method had the drawback that bromocrotonic acid was not commercially available in large quantities, and also the corresponding bromocrotonic acid methyl ester could only be available in a purity of about 80%. These circumstances also preclude the suitability of this procedure for the technical preparation of 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2 -buten-1-yl]amino}-7-((S)-tetrahydrofuran-3-yloxy)-quinazoline.

A la vista de los inconvenientes antes descritos del procedimiento de preparación conocido, es misión de la presente invención poner a disposición un procedimiento que permita la preparación de dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1 -oxo-2-buten-1 -il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina, con empleo de materiales de partida fácilmente accesibles en una elevada pureza y sin una gran complejidad técnica. Este nuevo procedimiento debe ser adecuado también para la síntesis a escala técnica y, por consiguiente, para la aplicación comercial.In view of the above-described drawbacks of the known preparation process, it is the object of the present invention to provide a process that makes it possible to prepare 4-[(3-chloro-4-fluorophenyl)amino]-6-{ dimaleate [4-(N,N-dimethylamino)-1 -oxo-2-buten-1 -yl]amino}-7-((S)-tetrahydrofuran-3-yloxy)-quinazoline, using readily available starting materials in high purity and without great technical complexity. This new procedure should also be suitable for synthesis on a technical scale and therefore for commercial application.

Este problema se resuelve mediante el procedimiento de acuerdo con la invención. Junto a la capacidad de realización técnica con elevados rendimientos, otras ventajas de la vía de síntesis de acuerdo con la invención son muy buenas purezas químicas y un bajo contenido en cis, inferior a 0,1%.This problem is solved by the method according to the invention. In addition to the ability to perform technically with high yields, other advantages of the synthesis route according to the invention are very good chemical purities and a low cis content, less than 0.1%.

Conforme al procedimiento de acuerdo con la invención, el correspondiente compuesto de aminoarilo (V) se hace reaccionar con un ácido di-(alquil C1-4)-fosfonoacético, preferiblemente con ácido dietilfosfonoacético, en disolventes adecuados, después de la correspondiente activación, preferiblemente con 1,1 -carbonildiimidazol, 1,1 -carbonilditriazol o anhídrido de ácido propanofosfónico, de manera particularmente preferida con 1,1 -carbonildiimidazol, de acuerdo con el Esquema 2. Como disolventes pueden utilizarse, por ejemplo, tetrahidrofurano (THF), dimetilformamida (DMF) o acetato de etilo.According to the process according to the invention, the corresponding aminoaryl compound (V) is reacted with a di-(C1-4 alkyl)-phosphonoacetic acid, preferably with diethylphosphonoacetic acid, in suitable solvents, after corresponding activation, preferably with 1,1-carbonyldiimidazole, 1,1-carbonylditriazole or propanephosphonic anhydride, particularly preferably with 1,1-carbonyldiimidazole, according to Scheme 2. As solvents it is possible to use, for example, tetrahydrofuran (THF), dimethylformamide (DMF) or ethyl acetate.

La activación puede realizarse según todas las posibilidades habituales para el enlace amida es decir, por ejemplo, con 1,1-carbonildiimidazol, 1,1-carbonilditriazol, DCC (N,N-diciclohexilcarbodiimida), EDC (N'-(dimetilaminopropil)-N-etilcarbodiimida), TBTU (tetrafluoroborato de O-(benzotriazol-1-il)-N,N,N',N'-tetrametiluronio, tiazolidin-2-tionas, o por transformación en el correspondiente cloruro de ácido, por ejemplo con ayuda de cloruro de tionilo. Eventualmente, la activación se lleva a cabo con empleo de bases orgánicas tales como trietilamina o piridina, pudiéndose añadir adicionalmente DMAP (dimetilaminopiridina). Como disolventes entran en consideración DMF, THF, acetato de etilo, tolueno, hidrocarburos clorados o sus mezclas.Activation can be carried out according to all the usual possibilities for the amide bond, that is to say, for example, with 1,1-carbonyldiimidazole, 1,1-carbonylditriazole, DCC (N,N-dicyclohexylcarbodiimide), EDC (N'-(dimethylaminopropyl)- N-ethylcarbodiimide), TBTU (O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate, thiazolidine-2-thiones, or by conversion to the corresponding acid chloride, for example with aid of thionyl chloride. If necessary, activation is carried out using organic bases such as triethylamine or pyridine, it being possible to add additionally DMAP (dimethylaminopyridine). Suitable solvents are DMF, THF, ethyl acetate, toluene, chlorinated hydrocarbons or their mixtures.

En las siguientes fórmulas, significan:In the following formulas, they mean:

X un átomo de nitrógeno,X a nitrogen atom,

Ra un grupo 3-cloro-4-fluorofenilo yRa a 3-chloro-4-fluorophenyl group and

R1 un grupo etilo.R1 an ethyl group.

Esquema 2:Scheme 2:

Figure imgf000003_0001
Figure imgf000003_0001

a) Ácido di-(alquil C1-4)-fosfonoacético, agente de activacióna) Di-(C 1-4 alkyl)-phosphonoacetic acid, activating agent

La arilamida (VI), obtenida de esta forma con un elevado rendimiento y elevada pureza, se hace reaccionar con el correspondiente 2-aminoacetaldehído con el empleo de bases orgánicas o inorgánicas adecuadas en el sentido de una reacción de Wittig-Horner-Emmons (Esquema 3). Esta reacción puede efectuarse directamente o después del aislamiento del compuesto (VI), por ejemplo por precipitación mediante la adición de, por ejemplo, terc.-butilmetiléter. A las bases adecuadas pertenecen, por ejemplo, DBU (1,5-diazabiciclo[4.3.0]non-5-eno), hidróxido de sodio e hidróxido de potasio, siendo preferidos hidróxido de sodio e hidróxido de potasio, siendo particularmente preferido hidróxido de potasio. En lugar del aldehído también se puede utilizar un correspondiente equivalente, p. ej., un hidrato o acetal, del que se libera el aldehído (de antemano o in situ). The arylamide (VI) obtained in this way in high yield and high purity is reacted with the corresponding 2-aminoacetaldehyde using suitable organic or inorganic bases in the sense of a Wittig-Horner-Emmons reaction (Scheme 3). This reaction can be carried out directly or after isolation of compound (VI), for example by precipitation by addition of, for example, tert-butyl methyl ether. Suitable bases include, for example, DBU (1,5-diazabicyclo[4.3.0]non-5-ene), sodium hydroxide and potassium hydroxide, sodium hydroxide and potassium hydroxide being preferred, hydroxide being particularly preferred. of potassium. Instead of the aldehyde, a corresponding equivalent can also be used, e.g. eg, a hydrate or acetal, from which the aldehyde is released (beforehand or in situ).

Esquema 3:Scheme 3:

Figure imgf000004_0001
Figure imgf000004_0001

b) Aldehido, base, THF/aguab) Aldehyde, base, THF/water

Como acetales se pueden emplear, por ejemplo, compuestos del siguiente tipo general:As acetals it is possible to use, for example, compounds of the following general type:

Figure imgf000004_0002
Figure imgf000004_0002

en los quein which

R3 y R4 significan en cada caso un grupo metilo yR3 and R4 each represent a methyl group and

R2 y R5 significan en cada caso un grupo etilo.R2 and R5 each denote an ethyl group.

La 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1 -il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina de la fórmula (I) se puede transformar a continuación, según el Esquema 4, en su sal dimaleato de la fórmula estructural (Ia). Para ello, el compuesto (I) se disuelve en un disolvente adecuado tal como, por ejemplo, metanol, isopropanol, n-butanol o etanol, eventualmente bajo la adición de agua, preferiblemente etanol y, bajo calentamiento, se mezcla con ácido maleico cristalino o una disolución de ácido maleico. En el caso de utilizar etanol como disolvente se trabaja preferiblemente a una temperatura entre 60 y 75 °C utilizando disolución etanólica de anhídrido maleico. Las condiciones de reacción se eligen preferiblemente de manera que la sal deseada se separa por cristalización lo más rápidamente posible. Preferiblemente, se utilizan aprox. 2 equivalentes de ácido maleico. Después de iniciada la cristalización, se enfria hasta la temperatura ambiente, se continúa agitando y se separa el cristalizado consistente en el compuesto (Ia).4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1 -yl]amino}-7-((S )-tetrahydrofuran-3-yloxy)-quinazoline of formula (I) can then be transformed, according to Scheme 4, into its dimaleate salt of structural formula (Ia). To do this, compound (I) is dissolved in a suitable solvent such as, for example, methanol, isopropanol, n-butanol or ethanol, optionally with the addition of water, preferably ethanol, and mixed with crystalline maleic acid under heating. or a solution of maleic acid. In the case of using ethanol as a solvent, preferably work at a temperature between 60 and 75 °C using ethanolic maleic anhydride solution. The reaction conditions are preferably chosen such that the desired salt crystallizes out as quickly as possible. Preferably, approx. 2 equivalents of maleic acid. After the start of crystallization, it is cooled to room temperature, stirring is continued and the crystallisate consisting of compound (Ia) is separated.

Esquema 4:Scheme 4:

Figure imgf000004_0003
Figure imgf000004_0003

c) Acido maleico, etanolc) Maleic acid, ethanol

El compuesto de partida de la fórmula (V) puede prepararse, por ejemplo, como sigue, según procedimientos en si conocidos por la bibliografia:The starting compound of the formula (V) can be prepared, for example, as follows, according to processes known per se from the literature:

Para la preparación del compuesto (V) con X = N se procede como sigue: To prepare compound (V) with X = N, proceed as follows:

Partiendo de ácido 4-cloro-antranílico (VIII; X’ = Cl) adquirible en el comercio se obtiene, por reacción con acetato de formamidina, la quinazolinona (IX) que, a continuación, se nitra utilizando ácido sulfúrico y ácido nítrico concentrado (Esquema 5b). Alternativamente, también se puede partir de ácido 4-fluoro-antranílico.Starting from commercially available 4-chloro-anthranilic acid (VIII; X' = Cl), quinazolinone (IX) is obtained by reaction with formamidine acetate, which is then nitrated using sulfuric acid and concentrated nitric acid ( Scheme 5b). Alternatively, it is also possible to start with 4-fluoro-anthranilic acid.

Esquema 5b:Scheme 5b:

Figure imgf000005_0001
Figure imgf000005_0001

a: X’ = Cla: X' = Cl

b: X’ = Fb: X' = F

d) acetato de formamididinad) formamididine acetate

e) H2SO4 , HNO3 conc.e) H 2 SO 4 , HNO 3 conc.

El regioisómero (X) deseado de los productos de nitración, así obtenidos, se clora luego y el producto de cloración (XI) se hace reaccionar in situ con la correspondiente amina (Esquema 6).The desired regioisomer (X) of the nitration products thus obtained is then chlorinated and the chlorination product (XI) is reacted in situ with the corresponding amine (Scheme 6).

Esquema 6:Scheme 6:

Figure imgf000005_0002
Figure imgf000005_0002

f) SOCl2, acetonitrilof) SOCl2, acetonitrile

g) RaNH2g) RaNH2

El compuesto de la fórmula (XII), así obtenido, se hace reaccionar con (S)-(+)-3-hidroxitetrahidrofurano para dar el compuesto (XIII). La hidrogenación del compuesto (XIII) o bien del compuesto (XVIII) del Esquema 5a proporciona entonces el compuesto de partida (V) (Esquema 7).The compound of the formula (XII) thus obtained is reacted with (S)-(+)-3-hydroxytetrahydrofuran to give the compound (XIII). Hydrogenation of either compound (XIII) or compound (XVIII) of Scheme 5a then provides starting compound (V) (Scheme 7).

Esquema 7:Scheme 7:

Figure imgf000005_0003
Figure imgf000005_0003

h) (S)-(+)-3-hidroxi-tetrahidrofuranoh) (S)-(+)-3-hydroxy-tetrahydrofuran

i) H2 i) H2

Otro objeto de la invención es el dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina según la reivindicación 4. Esta sal es particularmente adecuada para uso farmacéutico, dado que existe una modificación cristalina que es anhidra y muy estable.Another object of the invention is 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl] dimaleate amino}-7-((S)-tetrahydrofuran-3-yloxy)-quinazoline according to claim 4. This salt is particularly suitable for pharmaceutical use, since there is a crystalline modification which is anhydrous and very stable.

Para la aplicación farmacéutica, un principio activo no sólo tiene que mostrar el efecto deseado, sino que, además, debe satisfacer todavía otros requisitos con el fin de poder acceder a su empleo como medicamento. Estos parámetros están ligados, en una gran parte, con la naturaleza físico-química del principio activo.For pharmaceutical application, an active principle not only has to show the desired effect, but also has to satisfy still other requirements in order to qualify for its use as a medicine. These parameters are linked, to a large extent, with the physical-chemical nature of the active ingredient.

Sin limitación a los mismos, ejemplos de estos parámetros son la estabilidad de acción de la sustancia de partida bajo diferentes condiciones del entorno, la estabilidad en el transcurso de la preparación de la formulación farmacéutica, así como la estabilidad en las composiciones finales del medicamento. El principio activo medicamentoso utilizado para la preparación de las composiciones medicamentosas debería, por lo tanto, presentar una elevada estabilidad que debe garantizarse también bajo diferentes condiciones del entorno. Esto es forzosamente necesario, con el fin de impedir que encuentren uso composiciones medicamentosas en las que, junto al principio activo real, estén contenidos, por ejemplo, productos de degradación del mismo. En uno de estos casos, un contenido en principio activo que se encuentra en formulaciones farmacéuticas podría ser más bajo que el especificado.Without limitation thereto, examples of these parameters are the stability of action of the starting substance under different environmental conditions, the stability in the course of the preparation of the pharmaceutical formulation, as well as the stability in the final compositions of the medicament. The active drug principle used for the preparation of the drug compositions should therefore have a high level of stability, which must also be guaranteed under different environmental conditions. This is necessarily necessary, in order to prevent medicinal compositions from finding use in which, together with the actual active principle, are contained, for example, degradation products thereof. In one of these cases, a content of active ingredient found in pharmaceutical formulations could be lower than specified.

La absorción de humedad reduce el contenido en principio activo debido al aumento de peso provocado por la absorción de agua. Medicamentos que tienden a la absorción de la humedad deben ser protegidos frente a ésta durante el almacenamiento, por ejemplo mediante la adición de agentes de secado adecuados o mediante almacenamiento del medicamento en un entorno protegido frente a la humead. Además, la absorción de la humedad puede reducir el contenido de principio activo medicamentoso durante la preparación, cuando el medicamento esté expuesto al entorno sin una protección de todo tipo frente a la humedad. Preferiblemente, un principio activo medicamentoso debería ser, por lo tanto, higroscópico sólo en pequeña medida.Moisture absorption reduces the active ingredient content due to weight gain caused by water absorption. Drugs that tend to absorb moisture must be protected against moisture during storage, for example by adding suitable drying agents or by storing the drug in a moisture-protected environment. In addition, the absorption of moisture can reduce the content of drug active ingredient during preparation, when the drug is exposed to the environment without any type of protection against moisture. Preferably, a medicinal active ingredient should therefore only be hygroscopic to a small extent.

Dado que es importante la modificación cristalina de un principio activo para el contenido reproducible en principio activo de una forma de administración, existe la necesidad de dilucidar de la mejor manera posible un polimorfismo eventualmente existente de un principio activo que se presenta de forma cristalina. En la medida en que se manifiesten diferentes modificaciones polimorfas de un principio activo, debería garantizarse que la modificación cristalina de la sustancia no varíe en la posterior preparación del medicamento. En caso contrario, esto podría afectar negativamente a la actividad reproducible del medicamento. Ante estos antecedentes, se prefieren principios activos que se caractericen sólo por un bajo polimorfismo.Since the crystalline modification of an active substance is important for the reproducible active substance content of an administration form, there is a need to elucidate in the best possible way possible existing polymorphisms of an active substance present in crystalline form. Insofar as different polymorphic modifications of an active substance occur, it should be ensured that the crystalline modification of the substance does not change in the subsequent preparation of the medicinal product. Otherwise, this could adversely affect the reproducible activity of the drug. Against this background, active ingredients characterized only by low polymorphism are preferred.

Otro criterio que es de extraordinaria importancia bajo determinadas circunstancias en función de la elección de la formulación o en función de la elección del procedimiento de preparación, es la solubilidad del principio activo. Si se proporcionan, por ejemplo, disoluciones de medicamentos (por ejemplo para infusiones), entonces es irrenunciable una solubilidad suficiente del principio activo en disolventes fisiológicamente compatibles. También una solubilidad suficiente del principio activo es de gran importancia para medicamentos a aplicar por vía oral.Another criterion that is of extraordinary importance under certain circumstances depending on the choice of the formulation or depending on the choice of the preparation process, is the solubility of the active principle. If, for example, drug solutions (for infusions, for example) are provided, then a sufficient solubility of the active substance in physiologically compatible solvents is essential. A sufficient solubility of the active substance is also of great importance for medicaments to be applied orally.

La presente invención tiene por misión proporcionar un principio activo medicamentoso, el cual no se caracterice sólo por una elevada actividad farmacológica, sino que, además, satisfaga de la mejor manera posible los requisitos físico-químicos precedentemente mencionados.The purpose of the present invention is to provide an active drug principle, which is not only characterized by high pharmacological activity, but also satisfies in the best possible way the previously mentioned physicochemical requirements.

Este problema se resuelve mediante dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina disuelto según la reivindicación 4.This problem is solved by 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino} dimaleate -7-((S)-tetrahydrofuran-3-yloxy)-quinazoline dissolved according to claim 4.

Dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1 -oxo-2-buten-1 -il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina posee un punto de fusión de 1782C (véase el termoanálisis reproducido en la Figura 2). El dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1 -oxo-2-buten-1 -il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina cristalino se examinó con mayor detalle mediante difracción de rayos X de polvo. El diagrama obtenido está representado en la Figura 1. La siguiente Tabla recoge los datos obtenidos en este análisis: Tabla: Reflexiones de rayos X de polvo e intensidades (normalizadas del dimaleato de dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten 1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina4-[(3-Chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino}-7-((( S)-tetrahydrofuran-3-yloxy)-quinazoline has a melting point of 1782C (see the thermoanalysis reproduced in Figure 2). 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino}-7-( dimaleate Crystalline (S)-tetrahydrofuran-3-yloxy)-quinazoline was examined in further detail by X-ray powder diffraction. The diagram obtained is represented in Figure 1. The following Table collects the data obtained in this analysis: Table: X-ray reflections of dust and intensities (normalized for 4-[(3-chloro-4-fluorophenyl) dimaleate dimaleate amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten 1-yl]amino}-7-((S)-tetrahydrofuran-3-yloxy)-quinazoline

Figure imgf000006_0001
Figure imgf000006_0001

Figure imgf000007_0001
Figure imgf000007_0001

En la Tabla que antecede, el valor “2 0 [°]” representa el ángulo de difracción en grados y el valor “dhki [Á]” representa las distancias determinadas en Á entre los planos reticulares.In the above Table, the value "2 0 [°]" represents the diffraction angle in degrees and the value "d hki [Á]" represents the distances determined in Á between the lattice planes.

Los diagramas de rayos X de polvo se registraron en el marco de la presente invención mediante un difractómetro Bruker Advanced D8 equipado con un detector PSD y un ánodo de Cu como fuente de rayos X (radiación CuKa , A = 1,5418 Á, 40 kV, 40 mA).Dust X-ray patterns were recorded within the scope of the present invention using a Bruker Advanced D8 diffractometer equipped with a PSD detector and a Cu anode as X-ray source (CuK a radiation, A = 1.5418 Á, 40 kV, 40mA).

Los siguientes Ejemplos han de explicar más detalladamente la invención:The following Examples are to further explain the invention:

Ejemplos:Examples:

Ejemplo 1:Example 1:

Éster dietílico del ácido |[4-(3-cloro-4-fluoro-fenilamino)-7-((S)-tetrahidrofuran-3-iloxi)-quinazolin-6-ilcarbamoil]-metil}-fosfónico |[4-(3-Chloro-4-fluoro-phenylamino)-7-((S)-tetrahydrofuran-3-yloxy)-quinazolin-6-ylcarbamoyl]-methyl}-phosphonic acid diethyl ester

Figure imgf000008_0001
Figure imgf000008_0001

3,58 g de 1,1-carbonildiimidazol (22,16 mol) se disponen en 12,8 litros de tetrahidrofurano y, a 40°C, se mezclan con 4,52 kg (22,16 mol) de ácido dietilfosfonoacético, disueltos en 6,5 litros de tetrahidrofurano. Se continúa agitando durante 30 minutos a 40°C. La disolución, así obtenida, se designa disolución A.3.58 g of 1,1-carbonyldiimidazole (22.16 mol) are placed in 12.8 liters of tetrahydrofuran and, at 40°C, mixed with 4.52 kg (22.16 mol) of diethylphosphonoacetic acid, dissolved in 6.5 liters of tetrahydrofuran. Stirring is continued for 30 minutes at 40°C. The solution thus obtained is called solution A.

6,39 kg (17,05 mol) de N4-(3-cloro-4-fluoro-fenil)-7-(tetrahidrofuran-3-iloxi)quinazolin-4,6-diamina se disponen en 26,5 litros de tetrahidrofurano y, a 40°C, se mezclan con la disolución A y se continúan agitando durante 2 horas a 30°C. A la suspensión se añaden 64 litros de terc.-butilmetiléter y, después del enfriamiento hasta 20°C, el precipitado se separa por centrifugación. Se lava con una mezcla a base de 16 litros de tetrahidrofurano y 16 litros de terc.-butilmetil-éter y, a continuación, con 32 litros de agua y se seca a 50°C.6.39 kg (17.05 mol) of N4-(3-chloro-4-fluoro-phenyl)-7-(tetrahydrofuran-3-yloxy)quinazolin-4,6-diamine are placed in 26.5 liters of tetrahydrofuran and, at 40°C, they are mixed with solution A and stirring is continued for 2 hours at 30°C. 64 liters of tert.-butyl methyl ether are added to the suspension and, after cooling to 20°C, the precipitate is separated by centrifugation. It is washed with a mixture of 16 liters of tetrahydrofuran and 16 liters of tert-butylmethyl ether and then with 32 liters of water and dried at 50°C.

Rendimiento: 6,58 kg (69,8%) de cristales blancos, contenido: HPLC 99,1 FI%Yield: 6.58 kg (69.8%) of white crystals, content: HPLC 99.1 FI%

Ejemplo 2Example 2

[4-(3-cloro-4-fluoro-fenilamino)-7-((S)-tetrahidrofuran-3-iloxi)-quinazolin-6-il]-amida de ácido (E)-4-dimetilamino-but-2-enoicoAcid (E)-4-dimethylamino-but-2 [4-(3-chloro-4-fluoro-phenylamino)-7-((S)-tetrahydrofuran-3-yloxy)-quinazolin-6-yl]-amide -enoic

Figure imgf000008_0002
Figure imgf000008_0002

A 4,4 litros de agua se añaden 5,6 litros de ácido clorhídrico al 30% (53,17 mol). A continuación, se añaden gota a gota 4,28 kg de (dimetilamino)-acetaldehído-dietilacetal al 95% (26,59 mol) a 30°C en el espacio de 20 minutos. La disolución de reacción se continúa agitando durante 8 horas a 35°C, se enfría hasta 5°C y se almacena bajo argón. Esta disolución se designa disolución B.To 4.4 liters of water are added 5.6 liters of 30% hydrochloric acid (53.17 mol). Then, 4.28 kg of 95% (dimethylamino)-acetaldehyde-diethylacetal (26.59 mol) are added dropwise at 30°C within 20 minutes. The reaction solution is stirred for 8 hours at 35°C, cooled to 5°C and stored under argon. This solution is designated solution B.

4,55 kg (68,06 mol) de hidróxido de potasio se disuelven en 23,5 litros de agua y se enfrían hasta -5°C. La disolución se designa disolución C.4.55 kg (68.06 mol) of potassium hydroxide are dissolved in 23.5 liters of water and cooled to -5°C. The solution is designated solution C.

5,88 kg (10,63 mol) de éster dietílico de ácido ((4-(3-cloro-4-fluoro-fenilamino)-7-(tetrahidrofuran-3-iloxi)-quinazolin-6-ilcarbamoil)-metil)-fosfónico y 0,45 kg de cloruro de litio (10,63 mol) se disponen en 23,5 litros de tetrahidrofurano y se enfrían hasta -7°C. La disolución C fría se añade en el espacio de 10 minutos. A continuación, la disolución B se añade a -7°C en el espacio de 1 hora. Después de continuar agitando durante una hora a -5°C, la mezcla de reacción se calienta hasta 20°C y se combina con 15 litros de agua. Después del enfriamiento hasta 3°C, la suspensión se filtra con succión, el precipitado se lava con agua y se seca. Rendimiento: 5,21 kg de 100% bruto. Contenido en agua: 6,7%.5.88 kg (10.63 mol) of diethyl ester of acid ((4-(3-chloro-4-fluoro-phenylamino)-7-(tetrahydrofuran-3-yloxy)-quinazolin-6-ylcarbamoyl)-methyl) -phosphonic acid and 0.45 kg of lithium chloride (10.63 mol) are placed in 23.5 liters of tetrahydrofuran and cooled to -7°C. Cold solution C is added within 10 minutes. Solution B is then added at -7°C within 1 hour. After continuing to stir for one hour at -5°C, the reaction mixture is heated to 20°C and 15 liters of water are added. After cooling to 3°C, the suspension is filtered off with suction, the precipitate is washed with water and dried. Yield: 5.21 kg of 100% crude. Water content: 6.7%.

La cristalización del producto bruto se efectúa con acetato de butilo/metilciclohexano. Rendimiento: 78%, pureza HPLC 99,4% FI, contenido en agua 5,4%.The crude product is crystallized with butyl acetate/methylcyclohexane. Yield: 78%, HPLC purity 99.4% FI, water content 5.4%.

Ejemplo 3Example 3

Dimaleato de (4-(3-cloro-4-fluoro-fenilamino)-7-((S)-tetrahidrofuran-3-iloxi)-quinazolin-6-il)-amida del ácido (E)-4-dimetilamino-but-2-enoico (E)-4-Dimethylamino-but acid (4-(3-chloro-4-fluoro-phenylamino)-7-((S)-tetrahydrofuran-3-yloxy)-quinazolin-6-yl)-amide dimaleate -2-enoic

6,0 kg (12,35 mol) de dimaleato de (4-(3-cloro-4-fluoro-fenilamino)-7-((S)-tetrahidrofuran-3-iloxi)-quinazolin-6-il)-amida del ácido (E)-4-dimetilamino-but-2-enoico se disponen en 84 litros de etanol y se calientan hasta 70°C y se mezclan con una disolución de 2,94 kg (25,31 mol) de ácido maleico en 36 litros de etanol. Después de iniciada la cristalización, se enfría primeramente hasta 20°C y se continúa agitando durante 2 horas, y luego durante 3 horas a 0°C. El precipitado se filtra con succión, se continúa lavando con 19 litros de etanol y se seca en vacío a 40°C. Rendimiento: 8,11 kg (91,5%)6.0 kg (12.35 mol) of (4-(3-chloro-4-fluoro-phenylamino)-7-((S)-tetrahydrofuran-3-yloxy)-quinazolin-6-yl)-amide dimaleate of (E)-4-dimethylamino-but-2-enoic acid are placed in 84 liters of ethanol and heated to 70°C and mixed with a solution of 2.94 kg (25.31 mol) of maleic acid in 36 liters of ethanol. After crystallization has started, it is cooled first to 20°C and stirring is continued for 2 hours, and then for 3 hours at 0°C. The precipitate is filtered off with suction, washing is continued with 19 liters of ethanol and dried in vacuo at 40°C. Yield: 8.11 kg (91.5%)

P. f.; 178°CP.f.; 178°C

1H-RMN (CD3OD): 5 = 2,47 2,27 (m+m, 2H), 2,96 (s, 6H), 4,03 (m, 2H), 4,07+3,92 (m+m, 2H), 4,18+4,03 (m+m, 2H), 5,32 (m, 1H), 6,26 (s, 4H), 6,80 (m, 1H), 6,99 (m, 1H), 7,27 (s, 1H), 7,30 (t, 1H), 7,66 (m, 1H), 7,96 (dd, 1H), 8,62 (s, 1H), 9,07 (s, 1H) ppm. 1H-NMR (CD 3 OD): 5 = 2.47 2.27 (m+m, 2H), 2.96 (s, 6H), 4.03 (m, 2H), 4.07+3.92 (m+m, 2H), 4.18+4.03 (m+m, 2H), 5.32 (m, 1H), 6.26 (s, 4H), 6.80 (m, 1H), 6.99 (m, 1H), 7.27 (s, 1H), 7.30 (t, 1H), 7.66 (m, 1H), 7.96 (dd, 1H), 8.62 (s , 1H), 9.07 (s, 1H) ppm.

Claims (6)

REIVINDICACIONES 1. Procedimiento para la preparación del dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina, que abarca las etapas a y b1. Procedure for the preparation of 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl] dimaleate amino}-7-((S)-tetrahydrofuran-3-yloxy)-quinazoline, encompassing steps a and b a) reacción de un compuesto de la fórmula general (V)a) reaction of a compound of general formula (V)
Figure imgf000010_0001
Figure imgf000010_0001
en la que X significa un átomo de nitrógeno yin which X means a nitrogen atom and Ra significa el grupo 3-cloro-4-fluorofenilo,R a means the 3-chloro-4-fluorophenyl group, en disolventes adecuados después de la correspondiente activación con ácido di-(alquil C1-4)-fosfonoacético yin suitable solvents after corresponding activation with di-(C 1-4 alkyl)-phosphonoacetic acid and b) reacción del compuesto de la fórmula general (VI) así obtenidob) reaction of the compound of the general formula (VI) thus obtained
Figure imgf000010_0002
Figure imgf000010_0002
en la que X significa un átomo de nitrógeno,in which X means a nitrogen atom, Ra significa el grupo 3-cloro-4-fluorofenilo yR a means the 3-chloro-4-fluorophenyl group and R1 significa un grupo alquilo C1-4 lineal o ramificado,R 1 means a linear or branched C 1-4 alkyl group, con el aldehído de la fórmulawith the aldehyde of the formula
Figure imgf000010_0003
Figure imgf000010_0003
en la que R3 y R4 significan en cada caso un grupo metilo,in which R3 and R4 each represent a methyl group, o un correspondiente equivalente de aldehído con empleo de bases orgánicas o inorgánicas adecuadas, así como la siguiente etapa c):or a corresponding aldehyde equivalent using suitable organic or inorganic bases, as well as the following step c): c) transformación de la 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina en el dimaleato mediante reacción bajo calentamiento con ácido maleico en un disolvente adecuado.c) transformation of 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino}-7 -((S)-tetrahydrofuran-3-yloxy)-quinazoline into the dimaleate by reaction under heating with maleic acid in a suitable solvent.
2. Procedimiento según la reivindicación 1, caracterizado por que se utilizan etanol o isopropanol como disolvente, eventualmente bajo la adición de agua.Process according to claim 1, characterized in that ethanol or isopropanol is used as solvent, optionally with the addition of water. 3. Procedimiento según la reivindicación 1 ó 2, caracterizado porque se utilizan al menos 2 equivalentes de ácido maleico. Process according to claim 1 or 2, characterized in that at least 2 equivalents of maleic acid are used. 4. Dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1 -oxo-2-buten-1 -il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina, caracterizado por los siguientes ángulos de difracción determinados mediante radiación CuKa con una longitud de onda de A = 1,5418 A:4. 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino}-7-dimaleate ((S)-tetrahydrofuran-3-yloxy)-quinazoline, characterized by the following diffraction angles determined by CuKa radiation with a wavelength of A = 1.5418 A:
Figure imgf000011_0001
Figure imgf000011_0001
Figure imgf000012_0001
Figure imgf000012_0001
5.- Medicamentos que contienen dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina según la reivindicación 4, eventualmente junto con uno o más sustancias de soporte y/o agentes diluyentes inertes.5.- Medicines containing 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino dimaleate }-7-((S)-tetrahydrofuran-3-yloxy)-quinazoline according to claim 4, optionally together with one or more carrier substances and/or inert diluents. 6. Uso de dimaleato de 4-[(3-cloro-4-fluorofenil)amino]-6-{[4-(N,N-dimetilamino)-1-oxo-2-buten-1-il]amino}-7-((S)-tetrahidrofuran-3-iloxi)-quinazolina cristalino según la reivindicación 4 para la producción de un medicamento para uso en el tratamiento de tumores benignos o malignos, para la prevención y el tratamiento de enfermedades de las vías respiratorias y de los pulmones así como para el tratamiento de enfermedades del tracto gastrointestinal y de los conductos biliares y la vesícula biliar. 6. Use of 4-[(3-chloro-4-fluorophenyl)amino]-6-{[4-(N,N-dimethylamino)-1-oxo-2-buten-1-yl]amino}-dimaleate Crystalline 7-((S)-tetrahydrofuran-3-yloxy)-quinazoline according to claim 4 for the production of a medicament for use in the treatment of benign or malignant tumors, for the prevention and treatment of diseases of the respiratory tract and of the lungs as well as for the treatment of diseases of the gastrointestinal tract and of the bile ducts and gallbladder.
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